The recent performance of Getty Images' stock has caused market analysts to drop their estimates. Zacks Investment Research, founded in 1978 by math PHD Len Zacks, just added Getty to its "Stocks to Sell Now" list of five underperformers. According to the company, earnings estimates for the year are at $2.19 per share, down 30 cents from a week ago. The decline of the stock is attributed to Getty's forecast of third-quarter profit and sales, which fell below Wall Street expectations.